Centurion Arms

Centurion Arms ranks #67 of 393 brands on GunPartPicker so far in October 2026, just behind Trijicon, with about 1 in every 500 parts builders added. Up from #75 in September. Builders are reaching for Centurion Arms mostly for lower receiver parts. The most added single part is the Centurion Arms CM4 5.56 Forged AR-15 Receiver Set, on top again this month.

About 35% of the 34 Centurion Arms products we track are in stock today.

Also popular this month: Centurion Arms CM4 5.56 Forged AR-15 Receiver Set, Centurion Arms CM4 5.56 Forged AR-15 Lower Receiver, Centurion Arms MK11 7.62 Billet Receiver Set and Centurion Arms AR-15 5.56 Chrome Carrier - Sand Rail Cut.

Why Centurion Arms

Centurion Arms builds hard use AR-15 rifles, uppers, rails and parts, and most people know it for free float handguards. Complete guns like its MK18 Mod 0 clone run about $2,400, and the Gordon Carbine SBR about $2,000.

Its lowers sell close to the typical price, about $225 against roughly $215, and about 5% of lowers added to builds here are Centurion. That's a real following for a smaller shop.

You pay a little more than a basic forged lower, and complete rifles sit well above entry level. We'd look at Centurion if you want a duty style rail or lower from a smaller maker and don't mind paying for it.