This is a sniper gray ceracoat Aero M5 in 6.5 Creedmore with a Proof 20” barrel in rifle +2 gas system with an adjustable gas block (it has been used suppressed). The stock is a Magpul UBR and has the Vltor A5 buffer with a rifle length spring. Timney trigger and PA 4-14 MRAD Grid Scope with Aero 30mm mount. Comes with UBR box and the insert if you want to use it as a carbine length buffer tube. I am a certified Sig Sauer AR/15/M4 armorer, so everything was built to specs (see photos).