Carbine / Rifle / DMR Length Inner BarrelsInner barrels can fit in different airsoft rifles — from compact M4s to AK47s — of different lengths. Whether you’re looking for a 509mm inner barrel for your M16 DMR AEG or a 248mm inner barrel for your G36C or P90 AEG, Airsoft Megastore has you covered. We also have inner barrel for pistols. In addition, Airsoft Megastore also offers tighbore barrels from 6.04mm to 6.01mm in diameter. Buy your inner barrel at Airsoft Megastore today for some of the lowest prices on the market!