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RTB Premium Phosphate Bolt Carrier Group - 158 HPT/MPI

Rating: Total Reviews: (8 reviews) Write a Review
Product Code: RTB-M16-HPT-MPI
Stock Status Stock Status: Out of Stock
List Price: $129.99
MSRP: $129.99
Sale Price: Sale Price: $69.95
Savings: $60.04
$69.95
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Right To Bear Premium Mil-Spec Phosphate Bolt Carrier Group - 158 HPT/MPI BCG

These Military surplus 158 Bolt carrier groups are manufactured by a leading Military contractor to the exacting standards of the US Military. These HPT / MPI BCG's are rigorously inspected and are individually High Pressure Tested and then go through a Magnetic Particle Inspection.


Mil Spec Bolt
  • 158 Carpenter Steel
  • Shot Peened
  • High Pressure Tested (HPT)
  • Magnetic Particle Inspected (MPI)


Mil Spec Carrier
  • 8620 Aircraft Grade Steel
  • Full Mass M-16


Mil Spec Extractor
  • 4140 Steel per ASTM A108, cold drawn and stress relieved BHN 187-22
  • Phosphate Finish
  • Extractor Spring
  • Black Extractor Insert
  • Viton O-Ring

Mil Spec Gas Key
  • 4130 Profile Extruded Steel
  • Grade 8 Hardware
  • Properly Staked
  • Chrome Interior
SKU:
RTB-M16-HPT-MPI
Maximum Purchase:
100 units

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Write a Review
Rating:
8 Reviews

  • Ed

    Apr 21st 2021
    5 Apr 21st 2021
    AO bcg

    These bcg were a "best bang" for your buck when they were available. Made for companies like FN, colt, and our military. This is a no frills quality bcg.

  • Jan 26th 2020
    5 Jan 26th 2020
    Excellent “Mil-Spec” BCG

    Not much to say.....as others have stated RTB sources these BCG’s from AO Precision. So you know they are good to go and are built to last. Buy with confidence.

  • Jan 14th 2020
    5 Jan 14th 2020
    Mil-Spec BCG meant for use

    This is an AO Precision BCG for sure. Has the gray type finish that you see on a Colt/Mil-Spec BCG. It comes covered in a cosmoline type preservation agent to preserve the finish. Bolt is faintly marked MPI/HPT and has an O-ring on extractor. The machining is excellent and the finish is typical for what you see for a mil-spec BCG. It is a purely functional BCG and not meant to win any fashion shows

  • Dec 21st 2019
    5 Dec 21st 2019
    My favorite budget BCG!

    I ordered (2) of these during the Black Friday sale and the price was great and shipping was fast! These are manufactured by AO Precision to my knowledge (as of review date), and they make BCG'S for a lot of the big manufacturers in the game. These ARE marked MPI/HPT on the bolt and the carrier and gas key are both chrome lined. Both of mine shipped with extractor O-rings and springs, so that's the way I prefer to run all of my BCG's. It seems like they are using WD-40 to coat these after they manufacture them, cause there is dark brown stains on some parts of the carrier, and that is very difficult to remove and should not be used IMO. Also, one of the BCG's had an out of spec extractor pin, but that was taken care of immediately after one email was sent, so BRAVO on the excellent customer service! Overall, this is an EXCELLENT choice for a Mil-Spec BCG and you can't really ask for more!

  • Oct 26th 2019
    5 Oct 26th 2019
    Great BCG for the money

    So far so good, it works as intended. It was a little stiff when I got it but with use I’m sure it will smooth out.

  • Oct 23rd 2019
    5 Oct 23rd 2019
    Bolt Carrier

    great products not much else to say

  • Oct 8th 2019
    5 Oct 8th 2019
    Excellent BCG

    Excellent BCG. Great price fast shipping. HPT/MPI marked bolt, excellent staking and very smooth nice finish. These are AO precision just being sold under the RTB name. Buy with confidence. These will be all I buy from now on. Disregard the previous review these are superb.

  • Apr 29th 2019
    5 Apr 29th 2019
    wow

    I ordered this bolt carrier group on 4/26 and got it 4/29. My initial thoughts are It is .13 ounces heavier than some of my other boltcarrier groups, the gas key is staked properly, the finish is darker and deep, it locks up fine, the headspace was perfect, it cycles and functions flawlessly. After degreasing and lubricating with my lube of choice I took it to my backyard range and ran a few rounds through it and came to the conclusion that it still needs a few more rounds ran through it to break it in. For the price... it's a bargain, the shipping was fast, the quality is there. So I can honestly say that I would recommend this to a friend and I would suggest it to whom ever is reading this and I'd hope you would do the same.