Barrel by Thompson Center

Barrel Length: 16" / 40.6 cm

Barrel Twist: 1 in 8" 5R Rifling, same as Army M24 sniper rifle

Barrel material: 4140 steel

Barrel Finish: Melonite® seen on Springfield XD's and Glock

Front Sight: Adjustable A2 Post, standard

Rear Sight: Magpul® Folding MBUS

Stock: 6 Position Telescopic

Weight: 6.45 lbs. / 2,925.7

Receiver Material: 7075 T6 Aluminum, forged in housr

Trigger guard: forged receiver w/ integrated trigger guard

Receiver Finish: Hard Coat Black Anodized

Chromed Components: Gas Key Bolt Carrier

Bolt Carrier Group: by LMT

Hand guard: non-heat shielded standard contour

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Light, Accurate,Versatile M&P

So who manufactures the trigger set in the sport ?
I read somewhere it was standard, and what would that imply ?

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Light, Accurate,Versatile M&P

Good question!

There are two things I can't readily find, is the trigger set and the LMT bcg specs.

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Light, Accurate,Versatile M&P

I ran across this website listing the LMT bolt carrier group for sale:

Rainier Arms, LLC™ | Browse | Bolt Carrier Assemblies | Bolt Carrier Assembly: LMT

Surprisingly, the LMT website doesn't give much detail on their standard 5.56 Bolt Carrier group.

As far as trigger spec, I take standard to be a mil-spec standard, single stage, combat trigger. I read the ALG Defense ACT Trigger flyer. From that, I gleaned what they state to be standard trigger specs before they apply their voo-doo magic.

Trigger & Hammer = 8620 Steel Mil-Spec castings, carburized, quenched, and tempered for surface hardness.

Disconnector = 1070 Carbon Steel

Trigger & Hammer pin = mild steel

That bolt looks the part, as stated on the m&p specs as being chromed.
I wonder what would happen if I called either company.

Awaiting a response from LMT.

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Light, Accurate,Versatile M&P

Wouldn't hurt to try.

LMT did not respond, I asked as a customer wanting a replacement BCG for my M&P as there bolt comes factory from Smith & Wesson. Goin to ask Smith now.

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Light, Accurate,Versatile M&P

somewhere I read that the new Sport bolts are melonite treated!

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Grover Oathkeeper

Grover, I saw on another forum that someone said the sport BCG was melonite as opposed to chrome, 'since it was black'

All I know is S&W says mine on my M&P 15A is chrome, and its black as well. Maybe someone thought the chrome should be like on their pickup bumper...

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Rod
M&P 22A, 40c, 15A, 15-22

Mine is 2 1/2 months old and has a melonite treated bolt. My trigger broke at sloppy 7lb when when new and has settled in at sloppy 6lb 4oz. Sure wish there was a afordable 2lb trigger that fired 5.56 ammo every time. Most CS guys don't know there firearms worth a darn.

After I shot 500 rounds and my first mag dumps (glad it was russian ammo that stuff can get expensive quickly especially now that I have 8 mags. I took out the BCG and charging handle and cleaned it, I think that it is chrome with an anodized finish. you could see a little wear in the BCG, like you would see in the cylinder of a pretty new engine, more like the smoothing of machine marks. The carbon came away very easily but the bore of the rifle looked unbelievably clean, I ran a patch down it and it had a little stuff on it but not like I expected. cleaned the locking lugs and lubed it and put it back together. It isnt even hardly broken in. I have had mine for just a little over a month and a half I think. I will have to look back but I got it the very beginning of Feb.

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Grover Oathkeeper