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Posted: 9/13/2010 8:53:41 PM EDT
[Last Edit: 9/13/2010 8:54:13 PM EDT by badfishy]
i am in the process of building a lightweight dedicated 22. i have a spikes stripped m4 flat top upper, with a cavity for a forward assist assembly. should i have a standard forward assist assembly [non functional, with my spikes bolt], or plug it with a derlin flush fit plug?

here are my 2 choices:

DPMS Forward Assist Assembly

or

derlin plug

the price difference is marginal, as is any weight savings, i imagine.

so, which do you think i should choose?

thanks for your time.

Link Posted: 9/14/2010 2:45:36 AM EDT
You should use a 9MM upper.
No gas tube hole, no forward assist.
Link Posted: 9/14/2010 3:34:41 AM EDT
CMMG has a bolt adapter that makes the forward assist functional on their conversion kits.

For the cost difference I'd put the forward assist on.

If you really want to keep the weight down just leave the hole there.
Link Posted: 9/14/2010 4:38:19 AM EDT
I've plugged several of the forward assists. CMMG has pinned their forward assist to the bolt.
I'm not sure if there will be one to work with Spike's Bolt at this time. You can always install
a forward assist if it should come available for your bolt. Otherwise it serves no purpose.

Dave
Link Posted: 9/14/2010 11:15:20 AM EDT
[Last Edit: 9/14/2010 11:15:47 AM EDT by badfishy]
Originally Posted By frog5215:
You should use a 9MM upper.
No gas tube hole, no forward assist.


if money wasnt so tight, i would have....no question.

Originally Posted By SpecOps-13:
I've plugged several of the forward assists.



did you use that type of derlin plug, i linked to? how do they look, and hold up?

Link Posted: 9/14/2010 1:31:44 PM EDT
[Last Edit: 9/14/2010 1:33:03 PM EDT by SpecOps-13]
That's the exact same one I used.........
They look great and hold up perfectly well.


Dave
Link Posted: 9/14/2010 2:04:45 PM EDT
[Last Edit: 9/14/2010 2:05:45 PM EDT by badfishy]
Originally Posted By SpecOps-13:
That's the exact same one I used.........
They look great and hold up perfectly well.


Dave


do they come with a forward assist roll pin? i cant tell from the pic, and i would hate to be stuck ordering a 75 cent part, and paying shipping on it.

do you have any pics hosted, of one of your rifles with the forward assist plugged off, so i can see what it looks like installed?
Link Posted: 9/14/2010 3:54:15 PM EDT
Pin seperate as far as I remember. I took Forward Assists out.

This one appears to be well used.
http://www.adcofirearms.com/itemdetails_.cfm?inventorynumber=1960


Dave
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