StrangerDanger

Might try that if it's needed. I never had an issue with the NSR rail and covers even when fast firing. The NSR was supposed to get a heat shield developed for it, but I think that got sidelined by John passing away. Magnesium has a lower heat transfer rate than aluminum. So theoretically it should remain cooler than say the NSR.

Shipping says Monday for delivery.

I don't usually blast ammo off to the point that plastics are melting on the rail. I found zipties would melt in the past when attempting to secure cables to the rail. At least if they were anywhere near the gas tube or maybe the gas block. I have a few extra tape switches. So if it does melt, I'll rig up some sort of heat shield to slip behind the switch. Pretty sure the air gap behind the switch will keep most of the best off of the switch itself.

No kidding. I sent them an email asking what gives. Might be a fat fingered typo, but in two places? the suppressor really is massive. It dwarfs a birdcage/phantom/Vortex. It's basically a vortex on steroids. I'm pretty happy with the tape switch setup. It's about an ounce lighter than the SR07 rail switch. I'm going to have the wire painted to blend in with the rail. Only the pressure pad will be black. I noticed the the newer Surefire M600u's are quite a bit lighter than the older ones. Even their switch caps are lighter. My IWC mount arrived today for the light. Hopefully it snugs up tight to the rail. I'll screw with it tonight when I get home.

Take a look at this setup. i still need a few more LaRue index clips that have the top hook present to help secure the tape switch. I'm not normally a fan of tape switches, but this setup is awesome. The switch is in the perfect spot. Plus the switch is locked in place solid. It's also seated deep to prevent accidental light discharges. I decided des to get the barrel cut and the flash suppressor pinned. The B E Meyers is nearly 3" long, so that will cut the barrel to nearly flush with the rail. So only flash suppressor will be visible. I swiped a titanium gas block from V7 Weapon Systems to mount on the barrel. That'll save me about an ounce of weight. If ADCO will profile the barrel down lighter, I'll do it. B E Meyers lies about the weight of their flash suppressor. They claimed 2.5 ounces. It's really 3.5 ounces. I need to get the gas block and gas tube painted in high heat Cerakote before I send the barrel in for pinning.

Original architect of the true spec picatinny rail. Welcome back.

The 45 degree offsets are pretty much strictly for keymod accessories. I tried to install the BCM plastic picatinny rail sections at the 1:30 position for the Surefire -- It was a no go. There wasn't enough room for the mount since it was nearly touching the top rail. Even with the 45 degree positions, I ended up buying an IWC offset mount to tuck the Surefire M600 Ultra up at the 1:30 position. I'm trying to learn to like the Surefire SR-07 switch for the Surefire so I can have the weapon light mounted to the outside of my carry style. That way I'm not raking the light across my legs either.

Got some parts in today. Finally got my BCM KMR13 rail. This thing is seriously lightweight, but it still has more dieting to go. Mag Tactical Systems shipped out my magnesium upper receivers today. So when they come in, I'll swap out the BCM upper for the magnesium one. I'll also throw in a lightweight aluminum dust cover and a titanium forward assist. I'll drop in the inconel gas tube at that time. I'm also waiting for my IWC offset mount for the Surefire so I can get rid of that OEM mount. I found out today that the NSR rail covers fit the KMR great. Like they were made for it.

http://www.amazon.com/Craftsman-Metric-Combo-Ignition-Wrench/dp/B0026XTG1I/ref=pd_bxgy_hi_img_y I bought this set for the job. It works okay, but you're going to swear a lot anyway.

Finally got around to ordering a TTI shell elevator and their lightened hammer spring. I'll test it out to see if both are reliable on the M4.

I'd love to see BW's junk drawer! Phrasing, I know. Case: clean build. The NSR was my go to rail for the past two years. I was surprised, or as my female Asian friend would say, suh-pised to find that LaRue Aimpoints are still back ordered. I also noticed the price went up about 50 bucks since the last one I bought in early 2013.

You could offer 200 dollars and I bet no one would bite.

Nice. You'll like the pistol build. My 9mm AR15 pistol is pretty easy to shoot accurately. I thought about getting the Sig Brace for it, but I haven't had a chance to handle one to see how it would feel as a stock. I'd never use it as it was intended.

Sounds like a great build too. I couldn't bother to wait for them to release rails by themselves. I figured I'd migrate the BCM upper elsewhere or sell it off. I was going to get one of the titanium gas blocks from V7, but they only offer it in a .750" gas block profile. I would have used the V7 end plate and castle nut as well, but the PWS 416 extension has a proprietary one. I'm hoping Spikes has built a system similar to the ARGO plug into the gas key. I've had good luck with several of Spikes items. I'm a fan of their ion bonded gas ring sets. I use their MRP 22lr barrel and bcg nearly weekly without any issues. Their new sights look nice. I refuse to buy any more Troy products due to their politics, so their BUIS's are no longer an option unfortunately. While I would love to SBR this one, I never seem to get around to doing it. My attempts to find a local trust lawyer versed in setting it up properly have been a failure.

I ended up selling off my LMT MRP piston rifle recently. I also sold off a lot of the older parts that were present in order to do an all around upgrade for my rifle I tend to carry when hiking. Number one goal was to build something lightweight that is easy to snap onto target. Meaning low front end weight. Basic optic and light package. Yesterday, BCM finally let loose some BCM KMR rails. So I snagged a BCM BCH 16" lightweight upper receiver with the 13" KMR installed. I plan to disassemble the upper and remove the KMR to migrate over to a Mag Tactical Magnesium upper receiver I have on order. I already have the Mag Tactical lower receiver in hand. Here is what I have planned; Lower Receiver: Mag Tactical Systems Gen 4 Magnesium Lower Receiver (Owned) Receiver Extension: PWS 416 7075 Billet (Owned) Buffer: JP Enterprises Silent Buffer (Owned) Stock: MFT Battlelink Minimalist Stock, Mil Spec (Ordered) Trigger: Geissele SD3G (Ordered) Selector: Battle Arms Development CASS ST, Long/Short (Owned) Grip: BCM Gunfighter, Mod 2 (Ordered) Bolt Release: Seekins Billet (Owned) Magazine Release: Norgon Ambidextrous Release & Seekins Billet Button (Owned) Takedown Pins: Battle Arms Development Enhanced Pin Set (Owned) Other Small Parts: Colt (Owned) Magazines: Magpul M3, 30 and 20 rounders (Ordered) Sling: Blueforcegear VCAS padded QD sling (Owned) Upper Receiver: Mag Tactical Sytems Magnesium Upper Receiver (Ordered) Dust Cover: V7 Weapon Systems aluminum dust cover (Ordered) Barrel: BCM BCH 16" Lightweight Profile (Ordered) Rail System: BCM KMR13 (Ordered) Rail Covers: BCM KMR Rail Covers (When released) Gas Tube: V7 Weapon Systems Midlength Inconel Gas Tube (Ordered) Flash Suppressor: B. E. Meyers 249F (Ordered) Bolt & Carrier: Spikes Tactical Titanium Bolt Carrier & S7 Bolt (When released) Charging Handle: Raptor (Owned) Back Up Iron Sights: Spikes Tactical Lightweight BUIS (When released) Optic: Aimpoint T1, 2moa optic on a LaRue Absolute Co-witness mount, VFZ model (Back Ordered) Weapon Light: Surefire Scout M600 Ultra (Ordered) Weapon Light Mount: IWC Keymod Offset Mount (Ordered) Sling Mounts: Noveske Keymod QD Mount (Ordered) There are some areas where I could have went a little lighter, but I felt I would be sacrificing quality for fractions of an ounce in weight savings. Example, the 416 receiver extension. I figure I'm taking enough chances with the magnesium upper/lower. If either part yard sales itself, I have quality replacements on hand. I'm hoping to have a complete rifle that is in the low 5 pound range empty. I have a Magpul CTR Milspec on hand, but I figured I'd give the Battelink stock a try since it cuts about 3 ounces of weight compared to the CTR. As for coating/painting, I'm thinking of having the exterior painted in dark burnt bronze Cerakote and running black plastics. The interior of the 416 receiver extension and the Raptor charging handle is already coated in Nickel Boron. Magnesium and titanium cannot be coated.

FFT says the hammer for the M4 and M2 is the same. Benelli issues different part numbers for the two triggers though. I'd buy the trigger from FFT and order it from it's M2 section just to be safe.

Wow, big drop in trigger weight.

Always good to see a good give-away from a quality manufacturer.

Wow, what a rape. I just sold a spare one for 450 the other day. Common consensus is 4 US made parts must be added when using the OEM collapsible stock. So pick; 1. US made hammer 2. US made trigger 3. US made disconnector 4. US made handguards 5. US made full length magazine tube 6. US made magazine follower

Yes. All 11707's have the three position receiver extension. Strange, seems HK is out at the moment. There is like one on gunbroker and one on fleabay. They're kind of expensive though.

The 11707 will work just fine. Gun broker or HK on this forum sells them.

I'd live with it. I kept the Geissele and sold the FFT recently. The disconnector is cheap part. No functional change will be felt from adding it though. I've been considering adding the lighter hammer spring that Taran Tactical offers. It's supposed to improve the trigger pull too. Lighter pull I assume.

I like the rustic weathered look. I'm buying an older table currently for the ranch I'm buying. Going for a similar used rustic look.

badkin100, nice build and nice table.

So did anyone actually confirm if the carrier will work with the M4? What about the hammer spring they offer? Anyone try it with the M4?