AR Sponsor
Posted: 4/4/2014 3:09:02 PM EDT
| Has anyone purchased a BCG from AR 15 brick.com/Range tool? They advertise that each one is HT and MPI individually not batch tested. Blah blah blah. Are they any good? Is it worth the buy for $85.00 shipped? Or would it be just another BCG that you throw in your range bag as back-up? |
Then what is a good standard requirements for the BCG? meaning materials used and processes done (HT/MPI)? I'm just looking for a spare backup that isnt going to break the bank since it will just be laying around collecting dust until its needed. Just wondering if that would be a viable option to look at or just a waste of time and money?
|
| Just get you an extra bolt & firing pin. If your BCG breaks, that's likely catastrophic failure, and dropping in a new one isn't going to fix anything. Though if you're shooting, & you break a lug on your reloads, then you should probably go home & tear down your reloads rather than slapping in your extra bolt & continuing on. But bolt lugs sometimes do break, so it won't hurt to have an extra. |
|
Quoted:
Then what is a good standard requirements for the BCG? meaning materials used and processes done (HT/MPI)? I'm just looking for a spare backup that isnt going to break the bank since it will just be laying around collecting dust until its needed. Just wondering if that would be a viable option to look at or just a waste of time and money? Historically milspec speaking: Bolt - Carpenter No. 158® steel HPT Bolt (High Pressure Tested/ Proof) MPI Bolt (Magnetic Particle Inspected) Shot Peened Bolt (stress relieved) Carrier - 8620 Steel Chrome Lined Carrier (AUTO/M16 profile) Chrome Lined Gas Key (inside) Gas Key Hardened to USGI Specifications. Some will state machined from 4140 billet/tool steel vs MIM steel and hardened. Grade 8 Hardened Fasteners. torqued to spec. Key Staked Per Mil-Spec. Some will use a specific sealant when assembling the key to the carrier. Tool Steel Extractor (non MIM) shot peened, 5.3.1.2 MIL-STD-171 phosphate finish Milspec or upgraded Extractor Spring Black Extractor Insert Mil-Spec Crane O-Ring (optional) firing pin retaining pin with 5.3.1.2 MIL-STD-171 phosphate finish cam pin with 5.3.1.2 MIL-STD-171 phosphate finish. firing pin with 1.2.2.2 MIL-STD-171 hard chrome finish In addition to this, some argue that 9310 steel is as good or better as a bolt material, and you are seeing many of these in the market now. This requires proper heat treatment to reach the specs that surpass C158. Some manufacturers will coat the carriers, bolts, and sometimes misc parts with a Nickel Boron, Chrome, Nitride, or other finish. Some of these are coated individually, and some are coated after final assembly. The best thing you can do is purchase from a reputable manufacturer with a long history of putting out good quality bolts/carriers. |
|
Quoted:
Historically milspec speaking: Bolt - Carpenter No. 158® steel HPT Bolt (High Pressure Tested/ Proof) MPI Bolt (Magnetic Particle Inspected) Shot Peened Bolt (stress relieved) Carrier - 8620 Steel Chrome Lined Carrier (AUTO/M16 profile) Chrome Lined Gas Key (inside) Gas Key Hardened to USGI Specifications. Some will state machined from 4140 billet/tool steel vs MIM steel and hardened. Grade 8 Hardened Fasteners. torqued to spec. Key Staked Per Mil-Spec. Some will use a specific sealant when assembling the key to the carrier. Tool Steel Extractor (non MIM) shot peened, 5.3.1.2 MIL-STD-171 phosphate finish Milspec or upgraded Extractor Spring Black Extractor Insert Mil-Spec Crane O-Ring (optional) firing pin retaining pin with 5.3.1.2 MIL-STD-171 phosphate finish cam pin with 5.3.1.2 MIL-STD-171 phosphate finish. firing pin with 1.2.2.2 MIL-STD-171 hard chrome finish In addition to this, some argue that 9310 steel is as good or better as a bolt material, and you are seeing many of these in the market now. This requires proper heat treatment to reach the specs that surpass C158. Some manufacturers will coat the carriers, bolts, and sometimes misc parts with a Nickel Boron, Chrome, Nitride, or other finish. Some of these are coated individually, and some are coated after final assembly. The best thing you can do is purchase from a reputable manufacturer with a long history of putting out good quality bolts/carriers. Quoted:
Quoted:
Then what is a good standard requirements for the BCG? meaning materials used and processes done (HT/MPI)? I'm just looking for a spare backup that isnt going to break the bank since it will just be laying around collecting dust until its needed. Just wondering if that would be a viable option to look at or just a waste of time and money? Historically milspec speaking: Bolt - Carpenter No. 158® steel HPT Bolt (High Pressure Tested/ Proof) MPI Bolt (Magnetic Particle Inspected) Shot Peened Bolt (stress relieved) Carrier - 8620 Steel Chrome Lined Carrier (AUTO/M16 profile) Chrome Lined Gas Key (inside) Gas Key Hardened to USGI Specifications. Some will state machined from 4140 billet/tool steel vs MIM steel and hardened. Grade 8 Hardened Fasteners. torqued to spec. Key Staked Per Mil-Spec. Some will use a specific sealant when assembling the key to the carrier. Tool Steel Extractor (non MIM) shot peened, 5.3.1.2 MIL-STD-171 phosphate finish Milspec or upgraded Extractor Spring Black Extractor Insert Mil-Spec Crane O-Ring (optional) firing pin retaining pin with 5.3.1.2 MIL-STD-171 phosphate finish cam pin with 5.3.1.2 MIL-STD-171 phosphate finish. firing pin with 1.2.2.2 MIL-STD-171 hard chrome finish In addition to this, some argue that 9310 steel is as good or better as a bolt material, and you are seeing many of these in the market now. This requires proper heat treatment to reach the specs that surpass C158. Some manufacturers will coat the carriers, bolts, and sometimes misc parts with a Nickel Boron, Chrome, Nitride, or other finish. Some of these are coated individually, and some are coated after final assembly. The best thing you can do is purchase from a reputable manufacturer with a long history of putting out good quality bolts/carriers. +1 |
|
Quoted: Just get you an extra bolt & firing pin. If your BCG breaks, that's likely catastrophic failure, and dropping in a new one isn't going to fix anything. Though if you're shooting, & you break a lug on your reloads, then you should probably go home & tear down your reloads rather than slapping in your extra bolt & continuing on. But bolt lugs sometimes do break, so it won't hurt to have an extra. |
AR Sponsor