I went with a 7.5" BA Hanson barrel for my build. Before the 7.5 is worthless and will not even penetrate air crowd chimes in, I also have a 8.3" 300blk SBR as well. My go to rifle is a 16" mid length with BA Hanson barrel .
This will be truck, range, fun gun. Range report to follow.
RANGE REPORT
I built this 7.5” upper on Sunday and was able to test fire it yesterday. After running over 140 rds of 5.56 and.223, I am happy to report that there was not one single issue. The gun ran 100%:rock:.
Ammo used: Federal Fusion MSR 62gr Speer Gold Dot 62gr American Eagle 55gr 223 Winchester 55gr 5.56 Remington 45gr JHP Hornady Frontier 55gr JHP
The gun:
RRA SBR Lower w Larue MBT trigger MFT Stock Aero Precision upper Ballistic Advantage 7.5” Hanson barrel Aero Precision Atlas 7” rail Aimpoint Micro H1 on Larue mount Kak Micro can Diamond Head BUIS
62gr Speer Gold Dot 50yds:
62gr Speer Gold Dot 25yds
62gr Federal MSR 100yds This message has been edited. Last edited by: usncorpsman, August 08, 2018 07:05 PM
August 05, 2018, 06:50 PM
SigM4
I like it. What BUIS are those?
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August 05, 2018, 07:41 PM
usncorpsman
quote:
Originally posted by SigM4: I like it. What BUIS are those?
Thanks.
The sights are Diamond Head polymer sights. They sit a little high, but we're just sitting around so they got used.
August 05, 2018, 08:16 PM
P220 Smudge
I like that setup, looks handy and lightweight.
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August 06, 2018, 04:42 PM
Loswsmith
quote:
Originally posted by usncorpsman: Before the 7.5 is worthless and will not even penetrate air
The 7.5" barrel is worthless and won't even penetra . . . Oh. Well, just sayin'.
The gun looks great! What's the overall weight on that?
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August 07, 2018, 10:58 AM
gearhounds
Nice- nothing wrong with that short a barrel for PDW engagement distances.
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August 07, 2018, 08:18 PM
usncorpsman
quote:
Originally posted by Loswsmith: [QUOTE]Originally posted by usncorpsman: Before the 7.5 is worthless and will not even penetrate air
The 7.5" barrel is worthless and won't even penetra . . . Oh. Well, just sayin'.
The gun looks great! What's the overall weight on that?[/QUOTE
It weighs in at 6.6lbs with an empty 20rd PMag.
August 10, 2018, 11:23 PM
smithnsig
I think the 55 grain gold dots work well in 7.5” barrels.
----------------------------------------------------------- TCB all the time...
August 11, 2018, 09:12 PM
dewhorse
Nice...looking at doing something similar as a truck gun, with premium ammo 75m is quite realistic.
Don't suppose you chrono'ed the loads?
August 11, 2018, 10:53 PM
usncorpsman
quote:
Originally posted by dewhorse: Nice...looking at doing something similar as a truck gun, with premium ammo 75m is quite realistic.
Don't suppose you chrono'ed the loads?
I didn’t choose the two loads based on a super fast velocity. These rounds are know to perform well with expansion and penetration at lower velocities.
August 12, 2018, 12:16 PM
villageidiot
Dear usncorpsman aka Doc nice setup thanks for the pics of your 100 yard group. I have been curious how the 7.5 barrel would do at 100 yards. I have a 10.5 Sig pistol it does well at 100 yards also. When folks try to tell me what a weapon will do or not do ballistic wise I ask them if my round strikes them in their left nut or right nipple will you be able to determine the difference from another weapon or bullet type... VI
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This message has been edited. Last edited by: usncorpsman, 