Photos M21A5/RRM

[MK14 SEI]

This one is my sleeper.
The M21A5 action was built by SEI on a heel stamped Poly Tech receiver with SEI, USGI and Chinese parts.
The barrel is a standard profile 22.0" Crazy Horse tube. 4 groove, 1:10 ROT and a M118LR chamber.
The stock is a USGI synthetic with the no longer available Rigid Rail Modification (RRM).
Very accurate and no bullet drop when firing NATO ball through the SEI/Fisher suppressor

 

[mdh21225]

Re: M21A5/RRM

H2O Man,
I have been thinking about doing this with my M1A. I have a AAC QD can and they make a flash hider with the right threads.
Do you have any cycling problems? Any problems at all?
Looks good!
Thanks,
Matt

 

[MK14 SEI]

Re: M21A5/RRM

Matt, none of my M14s cycle sub sonic ammo.
NO problems at all, just that one minor inconvenience.