Monster 20" build

[Mark6.5]

Here is my build with the Monster 20 group buy barrel. It replaced a BCA SS 5R 20" that shot pretty darn good after i did some hand lapping of the bore and crown. This monster on my first 15 shots at 85 yards shot .55" with 6 shot group with factory black ammo. I am more than happy. It going to be a beast after the new year when i start to develop loads for it. Can't wait to get out to the range so i can get her zeroed at 100 yards. The 85 yard test shots was out near my mom's house.


This was a semi budget build. I could have chosen some more affordable parts than some of the ones i used, but the parts i put a bit of money in where the ones i felt matter the most. The barrel from BFT group buy is a amazing value! Would love to see a 22" from them.

She was built mainly to shoot out to 600-1000 yards at paper and steel, but she is now light enough to hunt with if i don't want to carry the weight of my 450BM

Parts List:

Monster 20 20" 5REE barrel

KM Tactical smooth side upper

17" slim M-Lok Handguard ( don't remember where purchased, i've had it for a while)

Atheris Rifle Co. 6.5 Grendel BCG

Atheris Rifle Co. Lower

Velocity Trigger's 3lb Straight Trigger

Anarchy Outdoors' "Penguin Grip" Precision Rifle Grip

Strike Industries Enhanced Castle Nut & Extended End Plate

Strike Industries Mono Pod

MidTen Tactical M-LOK Bipod 7.5-9 Inches

Generic ambidextrous charging handle

JE Designs Ar-15 "Quiet" Recoil Captured Spring & Buffer System

Heluis Tactical Stainless Seventeen SeventySix muzzle device.

UTG Accu-Sync 30 Rings

Scope is 4-16x44 FFP prototype.

Ambidextrous magazine release

Ambidextrous safety selector

Xtreme Precision extended takedown pins

Xtreme Precision anti roll pins

Xtreme Precision spring kit

Prototype Adjustable gas block

Pistol buffer tube

XLR knock off buttstock