Geissele Automatic's new SMR MK1 m4 rail....13" & 15"

Hi gents,

I wanted to go ahead and start this thread due to the fact that these rails are expected to be going hot any day now, and while the buzz surrounding them is certainly palpable....actual info, specs, availability, etc. on them is almost non exisitant thus far. Another thing to note is this first rail I got today I'm sure is now in the category of prototype as it doesn't have the product name on it, nor does it have the built in QD cups. So at any rate, over the next few weeks, you can expect a three part review of these rails from my end, but I wanted to let some of you whom I knew were chomping at the bit for info to get a little more understanding.

Part 1: First look....Geissele's new SMR MK1 m4 rail

This will be the portion I'm posting tonight, and while I hate to direct you guys to a youtube video which I only like to use in my threads as supplemental resources, this almost 10min. long video in full 1080p true HD I believe really depicts the impeccable machine work and top coat finishing on these rails, and more importantly it will serve as a visual guide as to some of the unique things about this rail rather than just trying to verbally type it out.

Part 2: Complete install tutorial via both pictorial instructions in this thread, as well as an install video on youtube. I will be including lots of advice directly from Bill G in this part as well. Lastly I will give overviews of the rifle or rifles I will be building directly around at least one of these rails if not two.

Part 3: Final field and range evaluations and tests....I will be using these rails for light precision builds, and one of these rifles might just have three GA in house core components in it, and the third potential GA component is a pretty darn big deal in my book when it comes to launching MK262 at distances beyond 600-700yds. If this component comes in, there will be copious amounts of factory ammo evals, associated velocity data with them, and LR shooting results.


PART 1: First look

Youtube video....

First look....Geissele's new SMR MK1 m4 rail

ETA...see better thread for info on these rails:

https://www.m4carbine.net/showthread...91#post1521091

Part 2: Install tutorial/build overviews

Before getting started....tips on installation from the man himself, Mr. Geissele:

"Here are quickie installation instructions:



*Remove existing hand guard, flash hider, gas block and stock barrel nut.

*Grease receiver threads with good quality grease or anti seize. Make sure the FACE of the barrel extension is greased where the Geissele bbl nut will tighten down onto

*Install Geissele bbl nut. Use supplied combo pin wrench and torque to 50 ft-lb

*Install low profile gas block and proper gas tube. (no indexing of the barrel nut is needed)

*Slide SMR onto barrel nut. Be careful. There is only .001” of clearance and the rail must be aligned to have the center of the barrel in the center of the rail before slipping it on the bbl nut. I put my fingers at the top of the rail near the muzzle and eyeball alignment to the barrel, then wiggle the rail back and forth until it starts. NO FORCING.

*Once the rail is on the two clamp bolts are installed. Note they only tighten halfway into the threads before getting stiff. There are screw locking inserts that the threads go into and the bolts must be cranked down the rest of the way. Do not tighten fully.

*Now the rail must be indexed to the receiver rail. Take a scope mount and bridge the receiver and rail. Semi tighten the scope mount to bring the SMR into rotational alignment with the receiver rail. (I don’t recommend using a level to align the two components)

*Tighten the two clamp bolts to 10 ft lbs with a 3/8” 12 point socket. Note the cross in the center of the bolt head is designed to use the lug of the weapon bolt to loosen or tighten the clamp bolt in the field.

*Screw the two small nylon tipped setscrews against the receiver. This makes the whole set up bombproof for anti rotation.

*Installation is complete



It is not recommended to loctite the screws that hold the accessory rails on, however if this is a semi-permanent install of the accessory rail, purple #222 loctite can be used (no blue or red) "

Bill also pointed out.....

" One thing. Those torque values are for guidance. People have been tightening bbl nuts without a torque wrench since 1960. Same with the clamp bolts. Torque values are for those who are not used to tightening bolts. "

Part 3: The final report....evaluations from the field and range

I like the attention to detail like the contours on the accessory rails and at the front of the top rail. Looks very nice so far.

I'd like to see/hear more about the mount and how robust it is compared to some others like the DD bolt-up, for example.

looking forward to pics of assembled weapon. There are no pics on his site, or info on pricing no length details either.

I have no idea if this is a paid advertisement or what.

Nice review and video. Do you work as a mime by any chance? :D

Do you have the weight of handguard + barrel nut?

Also where do the anti-rotational screws go in?

Great pics.

Could we get some specs like diameters and weight?

Beautiful, Trident! Excellent review.

Suweeet.

Thanks guys, but as lebowski so eloquently eluded to, at this point this thread doesn't serve much more than to simply inform the M4C community that the new GA rails are finally ready.

I will answer all the questions above very soon, and will try my best to get any future ones answered as quickly as possible. Ultimately receiving this rail was a total surprise, and I'm not going to build with used parts around these brand new rails so I had to order MURs, another barrel, and a few other things in order to get these built up.

Quote:

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Originally Posted by TRIDENT82

Ultimately receiving this rail was a total surprise

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How did the rail fairy know where you live? :D

Quote:

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Originally Posted by Stickman

How did the rail fairy know where you live? :D

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And just when I stopped believing in fairies....

Quote:

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Originally Posted by Littlelebowski

I have no idea if this is a paid advertisement or what.

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I'm pretty sure that m4carbine.net is actually a great big paid advertisement, and that's OK, that's how we get most of our info.

Cameron

When it's quality information and quality products, I have no issue with someone putting it out there.

There's a big difference between shilling crap and letting people know what's new and exciting from a very respected, supportive industry vet and member of our community. Bill Geissele more than fits that bill.

Bill builds great stuff hands down. Most of it stemmed from doing things for the Dept of Defense. This rail is a product of their HK416 rail request for Special Forces. I believe that's free marketing right there. Proven pays for itself.

I like the rail design and as it is made by Geissele I am sure it is top quality but do not care for the little set screws used for anti-rotation.

Quote:

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Originally Posted by Cameron

I'm pretty sure that m4carbine.net is actually a great big paid advertisement, and that's OK, that's how we get most of our info.

Cameron

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Yup, I just like disclosure. I have no doubt that this is quality kit.

For review pictures, I suggest you not blow out the highlights and make a matte rail look glossy.

Quote:

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Originally Posted by vicious_cb

Nice review and video. Do you work as a mime by any chance? :D

Do you have the weight of handguard + barrel nut?

Also where do the anti-rotational screws go in?

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I didn't get that at first because I hadn't seen the video. Once I watched the vid it made sense and I got a laugh out of it. I pictured him with face paint and all.:ph34r: