EMILIO M. GARZA, Circuit Judge:
This is a consolidated appeal by co-defendants, Brian Michael David Roberts (“Roberts”) and Major Harrison Booth (“Booth”). Both men entered conditional guilty pleas to firearms violations, 1 and now appeal the denial of their motion to suppress the firearms. For the reasons set forth below, we AFFIRM.
I
Officers Darren Clements and Kent Spencer received a tip that some of the residents of an apartment building might be in pоssession of stolen items and guns. Officers Clements and Spencer went to the apartment to investigate. They spoke with the occupants of an apartment who told them that a white male known as “B” had recently attempted to sell them a laptop computer, which they believed was stolen, and that “B” was carrying a gun on his hip during the interaction. The tipsters told the officers that “B” lived in apartment 2201, pointed out a small pickup truck that “B” drove, and indicated that a black male known as “Major” also lived in the apartment with “B.” The officers were also told that other people regularly stayed in the apartment with “B” and “Major.” A license plate check on the truck revealed that it was registered to Brian Roberts, who had several outstanding arrest warrants for traffic offenses. Based on this information, the officers surmised that Brian Roberts was the рerson identified as “B.”
The officers called for additional backup because they did not know how many people were in the apartment. While waiting, they observed a black man enter and exit the apartment. They did not see a white male.
Once a third officer arrived, the officers approached the apartment to arrest Roberts on the outstanding traffic warrants. Officers Clements and Spencer knocked on the door and a white man matching Roberts’s description answered. Officer Spencer identified himself and stated that they were looking for Brian Roberts so they could execute arrest warrants. The man at the door said that he was Roberts. The officers asked him for identification to verify his identity before making the arrest. At that point, the officers were still at the threshold of Roberts’s apartment, where they could perceive other people in the darkened room behind Roberts.
*309 Roberts turned back into the darkened apartment to retrieve his wallet from an entertainment center. At that point, the officers stepped into the darkened apartment, and Officer Clements shined a flashlight on Roberts to maintain supervision over the suspect.
When Officer Clements pointed the light at Roberts, Clements could see a pistol magazine and severаl loose rounds of ammunition in plain view on the entertainment center. The officers could also see other people in the apartment. Seeing the ammunition within easy reach, the officers immediately ordered Roberts to stop walking toward the entertainment center and return to the door. Officer Spencer handcuffed Roberts. The other occupants of the apartment were moved away from thе weapons and secured against one wall. The officers later retrieved the magazine and a gun that Roberts told them was under the couch.
Concerned that there might be other people and weapons in the apartment, the officers conducted a protective sweep. Officer Clements knocked at a locked bedroom door. A black male, later identified as Booth, opened the doоr. Officer Clements then entered the room and saw a shotgun leaning inside an open closet. He secured the gun and removed it from the apartment. Booth was taken into custody because he had an outstanding Georgia arrest warrant.
Roberts and Booth were indicted for federal weapons offenses. They moved to suppress the firearms seized from the apartment, claiming that the police lacked consent to enter the apartment and had no basis to perform a protective sweep. The district court denied the motion to suppress. Both men pleaded guilty conditionally, reserving their right to appeal the district court’s denial of their motions to suppress.
II
The standard of review for a “motion to suppress based on live testimony at a suppression hearing is to accept the trial court’s factual findings unless cleаrly erroneous or influenced by an incorrect view of the law.”
United, States v. Outlaw,
Roberts and Booth contend that their Fourth Amendment rights were violated when the police executed a warrantless search of the apartment. They argue that the officers conducting the search (1) had no justification for entering the apartment; (2) had no justification for conducting a protective sweep of the apartment; and (3) did not satisfy the elements of the “plain view” doctrine that would permit them to seize the weapons. Accordingly, they argue that the weapons seized during the search should have been suppressed.
A
Appellants argue that because Roberts admitted his identity in response to Officer Spencer’s question, the limited authority to enter a residence to effectuate an arrest warrant was not implicated. 2 Accordingly, *310 we first consider whether the оfficers’ entry into the apartment was valid.
The officers were reasonable in conducting a “knock and talk,” which is an accepted investigatory tactic.
See, e.g., United States v. Gomez-Moreno,
The Supreme Court has rejected the notion that exigent circumstances are required to justify entering an area in which a person has a protected Fourth Amendment privacy right where the entry is effectuated to maintain control over someone being placed under arrest.
See Washington v. Chrisman,
The Supreme Court found that exigent circumstances were not required to enter the dorm room because the arresting officers had authority to maintain custody over the arrested person.
4
Id.
(citing
Pennsylvania v. Mimms,
The facts here are even stronger than in
Chrisman.
The Supreme Court found that the entry to maintain control was reasonable
even in the “absence of an affirmative indication that the ... person might have a weapon available
or might attempt to escape.”
Id.
at 6,
Officer Spencer reasonably requested identification to verify that the suspect was who he said he was. Roberts moved into a darkened room to retrieve his identification. Based on the officers’ knowledge that Roberts had been seen with a gun and their observation — before stepping into the apartment — -that at least three other individuals occupied the dimly-lit room, the officers’ were justified in taking a step into the apartment in order to continuously observe Roberts. “There is no way for an officer to predict reliably how a particular subject will reaсt to arrest or the degree of the potential danger.”
Chrisman,
B
Roberts and Booth raise a second issue: whether the police were justified in conducting a protective sweep of Roberts’s apartment. “ ‘[A] “protective sweep” is a quick and limited search of premises, incident to an arrest and conducted to protect the safety of police officers or others.’”
United States v. Gould,
The district court found that the protective sweep of the apartment was valid. Appellants argue that the sweep was unjustified because “[h]ad the police arrested Roberts when he acknowledged his identity, he would not have been in a position to harm anyone,” and “[n]o reasonable person would have thought that Roberts could *312 have caused any harm once in custody of the two armed officers who confronted him at his home.” Appellants also argue that “there was no testimony that Roberts was violent;” Roberts “never resisted arrest or tried to flee and wаs generally cooperative with the officer;” and, that after their entry, the officers “lacked any reasonable belief or suspicion that the apartment might be harboring someone who might cause them harm.”
Notwithstanding Appellants’ arguments to the contrary, the requirements for a valid protective sweep were met. The officers entered the apartment pursuant to a “legitimate law enforcement purpose.”
Id.
The officers were aware that Roberts had been seen with a firearm; they observed additional occupants in the darkened living room, a person other than Roberts exiting and reentering the apartment, and ammunition clips in plain view; and Roberts’s told them that a pistol was under the couch. The officers “possessed] a reasonable belief based on specific and articulable facts which, taken tоgether with the rational inferences from those facts, reasonably warranted] the officer[s] in believing that the area swept [may have] harbored an individual posing a danger to the officer or others.”
Buie,
C
Finally, Appellants challenge the seizure of the firearms. After establishing that the officers validly entered the apartment, the district court held that:
(1) the items seized were either found through admission of the defendant (telling detectives there was a gun under the couch) or because they were sitting in plain view during the sweep, (2) that the incriminating nature of the guns and ammunition were immediately apparent, and (3) that the police had a lawful right of access to the guns.
While the Fourth Amendment generally prohibits wаrrantless seizures,
see Buie,
*313
On appeal, Appellants challenge the third prong of the plain-view doctrine, arguing that there was no reason to believe that the firearms were illegal or otherwise incriminating.
5
They contend that “there is no evidence in the record that the police knew the criminal history of anyone in the home, thus there could be no immediate apparent illegal possession of the seized evidenсe,” and that “the facts do not support the idea that the mere presence of a gun clip and ammunition on the entertainment center was illegal.” Because Appellants did not argue at the suppression hearing that the incriminating nature of the firearms was not immediately apparent, our review is for plain error.
See United States v. De Jesus-Batres,
The weapons were illegal because they were possessed by persons who had no lawful right to possess them. However, the officers who seized the weapons did not know at the time of the seizure the criminal histories of Roberts and Booth that would make their possession of the weapons illegal. Thus, the incriminating nature of the weapons was not apparent at the moment they were seizеd and removed from the apartment.
Nonetheless, we think the police were justified in temporarily seizing the weapons under these circumstances.
See United States v. Rodriguez,
*314
The officers acted reasonably — the touchstone requirement of the Fourth Amendment — in seizing the weapons for the safety of thеmselves and the apartment’s occupants. Accordingly, such a temporary seizure does not violate the Fourth Amendment.
See, e.g., City of Indianapolis v. Edmond,
Ill
For the foregoing reasons, we AFFIRM Roberts’s conviction for violation of 18 U.S.C. § 922(g)(3) and Booth’s conviction for violation of 18 U.S.C. § 922(g)(1).
Notes
. Booth pleaded guilty to one count of being а felon in possession of a firearm, in violation of 18 U.S.C. § 922(g)(1). Roberts pleaded guilty to one count of possession of a firearm by a user of a controlled substance, in violation of 18 U.S.C. § 922(g)(3). The charges were based on a 9mm handgun and a 12-gauge shotgun seized from the apartment where the men lived.
. Appellants also argue that the arrest warrants for traffic violations could not justify the
*310
officers' entry into the apartment. Although we havе long recognized that "[p]olice armed with an arrest warrant and probable cause to believe that a suspect is at his home have the right to enter the premises to arrest him,” we have not explicitly addressed whether the type of warrant matters.
See, e.g., United States v. Virgil,
. There is nothing in the record to suggest that the request was unreasonable or would create exigent circumstances. Indeed, the officers had no way of knowing that the request would result in Roberts walking back into the darkened apartment. No doubt if they gave any thought to the matter at all, they reasonably would have expected that Roberts would produce identification from somewhere on his person.
. Although the Supreme Court refers to the student as having already been placed under arrest when the officer accompanied him back to his dorm room to retrieve identification,
id.
at 6,
. We note that the district court conducted its Fourth Amendment analysis of the weapons, including the gun retrieved from under the couch, under the rubric of the plain-view doctrine. It is clear that the district court was attempting to fit the search and seizure of the weapons at issue into existing legal doctrine. Nonetheless, it was error to find the gun under the couch — which was not in plain view and was retrieved based on Roberts’s admission that it was located there — to be an item in plain view. However, Roberts and Booth do not challenge the plain view prong of the district court’s analysis, and thus have waived the error. Accordingly, we consider only the argument that the incriminating nature of the weapons were not immediately apparent.
. It does not appear that the gun was immediately retrieved and removed from the housе. Rather, the officers conducted a protective sweep and located Booth and another individual in a bedroom with a shotgun in plain view. Although one might question whether the better course of action would have been to immediately retrieve and secure the gun under the couch, the officers’ decision to first move the occupants of the living room away from the couch and conduct a protective sweep of the remainder of the apartment was reasonable given their concern that other persons and weapons might be present.
