"See If I Could Do It" Pistol Build

[Captiva]

In light of:

It would be nice if you took time to explain how you came to your decision and explain your set up

I wanted to see if I could build a pistol.. That's pretty much it. Gun has no real purpose, but “internal home defense” is what I could claim. The decision to use the parts listed below was from lurking here for half a decade. I realize this is a place for people who have chosen or are conscripted to use these tools like I use a Bloomberg Terminal so I appreciate all of the sharing of accumulated knowledge and attitude here.

Parts list:

LOWER RECEIVER

JP Enterprises, Inc.

Lower JP-15
Factory trigger
Selector
Trigger Pins
JP Speed Hammer

Bravo Company Manuf.

Pistol buffer tube & spring,
QD end plate, castle nut

Colt Manuf.

Buffer H2

Seekins Precision

Bolt catch
Magazine release button
Trigger guard

DSG Arms

Magazine catch

CMMG

All other pins
All other springs

Noveske Rifleworks

Take down pin
Pivot pin

Exile Machine

Foam pistol buffer tube cover

Magpul

MOE-K Pistol Grip

UPPER RECEIVER

JP Enterprises

A3 upper receiver

DSG Arms

Forward assist
Dust cover

WMD Guns

Bolt
Bolt carrier group

Bravo Company Manuf.

Charging handle Mod 4
Gas tube (carbine)
Keymod Rail 10”

White Oak Armament

10.5” 1-7 SS “match” barrel
SS gas block

Noveske Rifleworks

KX5 Flash Suppressor

Attachments

Trijicon RMR04
Larue Tactical RMR mount LT827
Inforce APL light

Weapon Shield grease
Clenzoil oil

Excel tells me the parts above cost $1,370.65 excluding the amount spent on numerous specialty tools and the detachable accessories both that can be used for other armaments. I acquired most of the parts over nine months and putting stuff together as I received it. I followed instructions from here, TOS, random AR15 dedicated blogs, YouTube, and Brownells. Attaching the BCM KMR was the least enjoyable task. I sure hope it doesn't blow up the first time I use it. I still can't believe everything fit together and I didn't lose a single part.

Photos to follow once I get some good natural light.

[Captiva]

[officerX]

Nicely done.

[hotrodder636]

What made installing the KMR "...least enjoyable"?

[Captiva]

Operator error. Not having the right tool to loosen the barrel nut "at least 4 times" after tightening to 40-50 foot pounds. As a result I raised burrs that needed to be cleaned up before sliding on the rail. I should have taken pictures of that for entry into the gunsmithing hall of shame thread.

[TF82]

Alright, I'm curious because I'm pretty likely to buy one soon, doesn't it come with the tool?

[Captiva]

The KMR does comes with a "barrel nut wrench"

http://www.bravocompanyusa.com/BCM-K...cm-kmr-bnw.htm

but it is worthless by itself. In order to use it as designed you need a 1/2"torque wrench

http://www.craftsman.com/craftsman-m...1&blockType=G1

to tighten the nut, and you need a 1/2" breaker bar to loosen the nut after tightening it to 40-50 foot pounds. The installation instructions say to tighten and loosen the nut at least four times.

http://t.harborfreight.com/12-in-dri....google.com%2F

Of course there are other ways to tighten and loosen, but these are the right tools for the job. I got burrs on my nut by not using the right tool.

Reference:
http://www.bravocompanymfg.com/downl...structions.pdf

[Tzook]

Try a Sig brace, you might like it

[TF82]

The KMR does comes with a "barrel nut wrench"

http://www.bravocompanyusa.com/BCM-K...cm-kmr-bnw.htm

but it is worthless by itself. In order to use it as designed you need a 1/2"torque wrench

http://www.craftsman.com/craftsman-m...1&blockType=G1

to tighten the nut, and you need a 1/2" breaker bar to loosen the nut after tightening it to 40-50 foot pounds. The installation instructions say to tighten and loosen the nut at least four times.

http://t.harborfreight.com/12-in-dri....google.com%2F

Of course there are other ways to tighten and loosen, but these are the right tools for the job. I got burrs on my nut by not using the right tool.

Reference:
http://www.bravocompanymfg.com/downl...structions.pdf

Oh, okay. I get you. I already have that stuff from a prior build so I'm good. Thanks for the clarification.

[BoomDoc]

Very straightforward, I like it.