What many might consider the all-star of personal defense weapon calibers, 5.7x28mm has cemented itself as a greatly effective round with less recoil than 5.56mm at closer ranges. With just a 5" barrel this ultra-compact BANSHEE(TM) will fit almost anywhere you need it. If you're not fond of pistol magazine-fed ARs don't worry, this BANSHEE is built on our Mk4 - AR15 platform which uses a standard AR15 lower receiver and our new and improved 5.7x28mm AR conversion mags. From the quick deploying RIPBRACE(R) to the stylized receivers and EML(TM) handguards, every BANSHEE is tailor-made to be the personal defense weapon you can always depend on. New EML4 handguards feature M-LOK(R) slots at 3, 6, & 9 o'clock positions and a full-length Picatinny top rail for accessories as well as an integrated handstop.- CALIBER 5.7x28MM- MAGAZINE (1) 20rd capacity PMAG- BARREL 5", 1/2x28 TPI, CMMG Zeroed Linear Comp- HANDGUARD CMMG EML4" M-LOK- UPPER RECEIVER Billet 6061 T6 Aluminum - LOWER RECEIVER MK4 Forged 7075 T6 Aluminum- BRACE CMMG Ripbrace