The PWS PCC uses a blowback gas system, and features a variety of unique upgrades from your traditional pistol caliber carbine. Starting with the PCC compensator, also available as a standalone item, this muzzle device delivers superior muzzle stabilization allowing shooters to have quick follow up shots. The free float M-LOK® handguard and billet lower receiver are designed to be sleek looking while also robust enough for non-stop heavy use for competition. The last-round hold open features a unique interface that works with standard GLOCK mags.