ar reliability upgrades #1: spirol pins
SRTLLC SPIROL / COIL PIN CONVERSION KIT: $20.00 each
The pins that are used in the assembly of many components of your AR rifle are called SPRING PINS. Commonly referred to as “Roll pins” or “Split Pins”, their design looks very much like a “C”!
- SPRING PINS / “Split pins” can only flex along its spine, 180 degrees opposite the gap, like opening and closing a book.
- When installed, they expand inside the bore of the hole, holding it in place at literally only two points of contact.
- They are made from 1050-1095 Spring Steel a lower grade carbon steel material.
- They are not passivated meaning they can corrode / rust.
- They are potentially very brittle, may sustain damage during the assembly process.
- They are a 1x (One) time usage item
- They are NOT designed to be re-used if you ever need to disassemble your rifle!
They may work fine for a while, but the potential for issues or failure are high!
The SRTLLC Coil Pin Conversion Kit contains 8 (Eight) pins, to replace the weaker “Split pins” on your rifle. The Coil pins were invented by the company called "SPIROL" way back in 1948. Other wise known as "Spiral Pins", "Roll Pins" or simply "Spring Pins".
- The Coiled Pins are a spiral design that compresses on itself during installation.
- The Coiled Pins are self-retaining fasteners achieved by radial tension applied against the hole wall, and they are the only press-fit pins designed to remain flexible after installation
- Once installed they expand inside the bore, exerting radial tension against maintaining contact over a minimum of 270 degrees of its circumference.
- The resulting friction prevents the pin from easily coming loose or falling out.
- The Coiled Pin’s ability to dampen shock/impact loads and vibration prevents hole damage and ultimately prolongs the useful life of an assembly.
- Coil pins are made from 420 Stainless Steel, much stronger than spring steel in this application.
- PASSIVATED, virtually corrosion and rust resistant.
- Rockwell C46 minimum hardness and are ASME B18.8.2 / ISO 8750 certified.
- These Coil Pins can be reused many times over in the bore they were installed in!
Coil Pins included in kit:
1. Bolt Catch Retaining Pin
2. Ejector Retaining Pin (Long) **measure against the removed split pin for correct length
3. Ejector Retaining Pin (Short) **measure against the removed split pin for correct length
4. Gas Tube Retaining Pin
5. Charging Handle Latch Pin
6. Forward Assist Retaining Pin
7. Forward Assist Pawl pin
8. Trigger Guard Pivot pin
*** each pin is in a separate labeled bag that is clearly marked for location***
Why take a risk with parts that that are weak to begin with on a rifle you need to be DEPENDABLE EVERY TIME YOU PULL THE TRIGGER!
Contact Us to arrange payment!
FREE shipping for SPIROL Conversion Kit!!!!
Discounts available on multiple item order
AR Reliability Upgrades #2. SPRINCO SPRINGS (pricing below)
Why SPRINCO SPRINGS?
It is our opinion the SPRINCO Spring are the absolute best springs that a person can use in an AR platform rifle!
All of the springs that SPRINCO manufactures are manufactured in the USA under strict adherence to ISO 9001:2015 quality standards, thus you are evaluating performance with a known commodity vs. a spring of unknown strength.
Here's a listing of all the different springs and components that SPRINCO offers!
BUFFER (ACTION) SPRINGS
CONSTRUCTION SPECS: CARBINE & RIFLE BUFFER SPRINGS
- ASTM Grade A877 Certified Valve Quality Chrome silicon Wire stock
- Heat Treated, Stress Relieved and Dual Stage Shot-Peened post winding (Our springs really ARE shot-peened)
- Impregnation / Plating with Re-Micronized Molybdenum Disulfide formulation
- Hard plastic tube packaging for protected transport and easy storage (Tubes make great storage compartments for all sorts of gear)
- Optional Cryogenic Processing Available (Select Item 26001)
ADVANTAGES:
- Increased "lock time" for faster sight recovery and platform stability
- Consistent spring pressure throughout the duty cycle of the spring, resulting in fewer malfunctions related to spring operation (Especially Type III malfunctions)
- Improved & consistent cyclic operation. Spring will not change performance for many hundreds of thousands of rounds
- Greater resistance to heat induced performance degradation
- Reduced cyclic rate with Enhanced or Extra Power springs and reduce / eliminate bolt bounce with optimal spring / buffer weight selection
- Reduced operating cost as replacement springs are not needed during the life of your upper receiver assembly. Less downtime and fewer trips to the armorer for spring replacement, in fact, this will most likely be the only buffer spring you will ever need for the duty cycle of your carbine or rifle!
- Correct spring selection works reliably, consistently, and virtually indefinitely in all properly built and maintained AR platforms
There are SEVEN (7) different colors of springs available, SRT will assist in selection of the CORRECT spring for your specific application!
EXTRACTOR SPRINGS
CONSTRUCTION SPECS: EXTRACTOR SPRINGS:
- Chrome Silicon Wirestock
- Heat Treated, Stress Relieved, and Cryogenic Processed Post Winding
- Impregnation / Plating with Re-Micronized Molybdenum Disulfide Formulation
ADVANTAGES:
- XP 5-Coil spring has a heavier spring load than OEM springs, thus negating the need for a D-Fender™ ring or adding CRANE Viton O-Rings
- Use 5-Coil spring with either black extractor spring insert OR CRANE Viton O-Rings, but not both
- Enhanced 4-Coil springs maintain an extended duty cycle load of a NEW Mil-Spec spring and is recommended for use in 18"+BBL lengths for those who retrieve their brass for reloading
- While the XP 5-Coil spring is totally reliable for all 5.56 BBL lengths, it can be aggressive on case rims in 18"+length BBL rifles, and may be too strong for some bolts with extremely tight bolt face tolerances
- Extreme duty cycles provided while maintaining performance specifications
- Unaffected by heat up to 750°F
- D-Fender™ rings are NOT recommended for use with our 5-Coil extractor springs.
- Dual spring XP .308 extractor spring sets may be used with or without CRANE O-rings. May be required for use in DPMS G2 Bolts for full-auto use.
- Plug & play - May easily be the only extractor springs needed for the life of your bolt!!
SRT will assist in selection of the CORRECT spring for your specific application!
EJECTOR SPRINGS
CONSTRUCTION SPECS: EJECTOR SPRINGS
- Chrome Silicon Wire stock
- Heat Treated, Stress Relieved, and Cryogenic Processed Post Winding
- Impregnation / Plating with Re-Micronized Molybdenum Disulfide Formulation.
ADVANTAGES:
- Enhanced ejector springs match the loads of a NEW Mil-Spec spring.
- Unaffected by heat up to 750ºF
- Extreme length duty cycle while maintaining performance specifications.
The EJECTOR SPRING is nearly a 100% guarantee of 100% reliability!
GAS RINGS
Gas rings are manufactured to MIL SPEC per MIL 8448511 and to TDP standards!
These are a very inexpensive insurance to 100% reliability!.
INSERTS AND O-RINGS
SPRINCO has supplied inserts and O-rings to OEM clients for years.
After failing to locate a supplier for true “Mil-Spec” components of consistent quality, we sought out top tier injection molding vendors, bought our own molds, and now supply our proprietary solutions that not only meet, but exceed the true current Mil-Spec performance requirements at a great price. Don’t be short changed by US Commercial Grade hardware store or foreign imports of questionable heritage and/or compromised material composition.
Everything we supply is Made in the USA from superior grade base materials.
- Black Extractor Spring Inserts per MIL-PRF-6855-REV G
- Viton CRANE O-Rings per MIL-R-83248C
The SRT / SPRINCO SPRINGS Conversion Kit is $40.00 PLUS shipping.
Included in the kit will be:
- 1 Buffer Spring (color is dependent on application)
- 1 Extractor Spring ( 4 or 5 coil depending on application)
- 1 Ejector Spring
- 3 Gas Rings
- 1 insert
- 1 O-ring
Contact SRT for full details and necessary information to determine correct spring selection for Buffer and Extractor springs!
Ejector spring will require specific tools to replace!
AR Reliability upgrade #3: SRT melonite gas tubes
Why a Melonite Gas tube?
One of the weakest points of the gas system is the gas tube, due to the heat created during firing.
AR Gas Tubes typically are manufactured from untreated Stainless Steel construction.
"Melonite® is a thermochemical treatment for improving the surface properties of steel parts. It exhibits predictable and repeatable results in the treating of low and medium carbon steels, alloy steels, stainless and austenitic steels, tool and die steels, cast and sintered iron."
Melonite is actually the brand name for specific manufacturers.
The process in which the material is introduced to the stainless steel gas tube is actually called ferritic nitrocarburizing. This is accomplished by salt bath nitriding of the gas tube.
Melonite Gas Tubes description
The SRT Melonite Gas Tubes have an extremely durable Black Nitride finish that increases corrosion resistance, wear resistance, fatigue strength and cosmetic appeal.
These gas tubes work great under a handguard because they are more durable than standard gas tubes. Available in pistol, carbine, patrol length, mid-length, and rifle lengths.
Does include a Spirol pin!