Compass Lake Engineering built Service Rifle Upper Optics Ready, on top of Bushmaster lower. 
Specs:
Compass Lake Engineering Service Rifle Upper
20" Krieger, Stainless Steel, 1:7.7 twist, with Compass Engineering chamber 
PreBan 1/4 MOA Rear Aperture .040, Carry Handle Upgrade and Pinned Rear Sight Base
.050 Front Sight Post 
Upper Reciver machined with rear sight well. 
Bushmaster lower 
Rock River Arms National Match trigger
Turner Saddlery AWS Synthetic Sling

This rifle was used once at Camp Perry and has been sitting in the safe since COVID broke out.  Rifle has aprox 500 rounds on the barrel.  Shoots FGMM 77gr SMK and Lake City or Black Hills 
MK 262 lights out! I did some load development with Nosler and SMK bullets over IMR8208, but didn't see the need to pursue it, as the rifle shoots box ammo fantastic.  This rifle is in very good conditon as you can see in the pictures.  I did spray Alumahyde on the barrel and front sight A Frame.  There are a couple small chips in the sprayed finsih on the right side of the barrel that are barely visable in the pictures posted.  Trigger is very crisp with outstanding re-set. I never used the carry handle sights, instead I mounted an ACOG for competiton.  I also have a jacket and glove (right hand)  for sale if you are interested.  I'm 6'3", 230 lbs, Ver long arms and XXL hands.  Let me know and I'll send some pics.   

Simply send me an email if you would like to purchase. Payment is by check or money order only!  Rfile will be mailed to your FFL after paymet has been deposited.  If you have questions, please email me at Sales@CTCgunworks.com.  Shipping is included in the price and will be via USPS two day priority mail with tracking.  Insuance is avaialble if you choose, but will be at your expense. Rifle will ship in a well padded cardboard rifle box.