Sig Sauer MCX PDW 5.5" 300BO SBR NFA Class III MLOK Folding stock New

Chambered in 300 BLK, this SIG MCX Rattler is a semi-automatic pistol configuration with a 5.5 in barrel and an aluminum M-LOK handguard. The factory configuration ships with one 30-round magazine and is listed by SIG Sauer as the Rattler pistol variant. The PMCX-300B-5B-TAP is part of the SIG MCX family and is offered in a compact PDW-style pistol form factor. Verified manufacturer listings identify this SKU as a 300 Blackout, 5.5 in barrel, semi-automatic MCX Rattler pistol with M-LOK handguard and a single 30-round magazine included.