Spike's Tactical .22LR upper and BDM full size mag report

[mempilot]

I'll start the Pro Con post by providing that I installed the conversion in my S&W M&P upper. I haven't had a chance to put more rounds through it since day one at the range. I'm guessing that different rifles will have varying success based on fit and function.

Conversion Pros:

cheap kit
cheap ammunition
quick change out from .223 to .22LR and back
easy quick maintanence
high quality from Spike

Conversion Cons:

dirtier (but can install gas tube plug)
don't know long term effect of .003" smaller bullet traveling down bore
I haven't seen the plating flake, but I don't have that many rounds through it

Dedicated Upper Pros:

just swap uppers and shoot
tuned recoil spring for that upper
no gas fouling of chamber (gas tubed blocked or non-existent AFAIK)
maybe more consistant performance
other pros the same as conversion

Dedicated Upper Cons:

cost of whole new upper to shoot .22LR

These are my opinions. I may have missed something. I'll keep plugging away with more .22LR every range visit and post back here my results.

[mac37]

The BDM mags need a few cycles to break in. Do not trim the spring. I have 10 mags and have found about 5 cycles and they become much easier to load. These mags are great and without them none of these 22 set-ups would be worth it. I run a Spikes and a buddy has a TacSol, both are extremely fun, accurate and reliable.

[OldNavyGuy]

1. Support

I've had an M261, a DPMS dedicated .22LR M4 upper, and a Spike's dedicated upper. The Spike's is far and away my favorite (so far).

would you mind explaining why.., i am looking for another .22LR upper, i currently own a TacSol .22LR upper and i believe it is the best .22LR upper, it out performs any and all of my .22LR rifles with the exception of my Remington M-550-1, a true "tack driver"

[mempilot]

I have 10 mags and have found about 5 cycles and they become much easier to load.

After running a lot more rounds through my mag, I have to agree. When it was new out of the box, I had a hard time getting anywhere near 20 rounds loaded. Now, I can get the 25 loaded that it's rated for. No trimming neccessary.