Shrike/ MCR good to go on converted SP1 lower?

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[ARCHIVED THREAD] - Shrike/ MCR good to go on converted SP1 lower?

Posted: 11/11/2018 11:56:58 PM EDT

Hi all.
Are there any issues with putting a full auto latest gen Shrike/ MCR belt fed upper on a Colt SP1 lower that has been converted? Does everything line up and function correctly despite the large pin vs small pin issue? Are folks generally happy with their Shrikes/MCR's in general, and would they buy them again if they had to do it over again? Thanks for any and all input. Trying to decide if its feasible and also worth the money.

Posted: 11/12/2018 12:15:37 AM EDT

[#1]

Quoted:
Are there any issues with putting a full auto latest gen Shrike/ MCR belt fed upper on a Colt SP1 lower that has been converted? Does everything line up and function correctly despite the large pin vs small pin issue?

View Quote

If you use an offset adapter pin, or have had the SP1 converted with permanent bushings, it'll fit and line up. Function will likely be up to the quality of the conversion job that was done when it was made into an RR.

Posted: 11/12/2018 6:41:33 AM EDT

[#2]

Awesome. That is what I was hoping to hear. Thank you!

Posted: 11/12/2018 6:10:37 PM EDT

[#3]

yea mine runs great...even with 250rds linked up

Posted: 11/21/2018 2:26:35 PM EDT

[#4]

Have M60 Joe bushing convert that thing, best thing I ever did for my SP1.

Posted: 11/21/2018 3:00:30 PM EDT

[#5]

Quote History

Quoted:
Have M60 Joe bushing convert that thing, best thing I ever did for my SP1.

View Quote

Thought M60 Joe was out of the game?

Posted: 11/21/2018 9:34:11 PM EDT

[#6]

I hadn’t heard that, he responded to an email I sent earlier today in minutes.

Posted: 1/5/2019 2:46:43 PM EDT

[#7]

Quote History

Quoted:
Have M60 Joe bushing convert that thing, best thing I ever did for my SP1.

View Quote

If M60Joe converts the lower to bushings how is the front pivot pin then contained in a slab side lower? Use one of the ball detent type pins?

Posted: 1/5/2019 3:07:24 PM EDT

[#8]

Quote History

Quoted:
If M60Joe converts the lower to bushings how is the front pivot pin then contained in a slab side lower? Use one of the ball detent type pins?

View Quote

Correct. You need the long ball detent pin or a later .250" Colt two-screw pivot pin. If the upper pivot lug is rebated, it's possible to use the tidier-looking 601-style ball detent pin.

Posted: 1/5/2019 11:34:50 PM EDT

[#9]

Quote History

Quoted:

If M60Joe converts the lower to bushings how is the front pivot pin then contained in a slab side lower? Use one of the ball detent type pins?

View Quote

M60Joe is no longer doing any work.

Posted: 1/12/2019 6:55:13 PM EDT

[#10]

That’s too bad, he did great work cheap on mine. Running a KNS push button pivot pin.

[ARCHIVED THREAD] - Shrike/ MCR good to go on converted SP1 lower?

Armory » M-16

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