My notes (and other findings) related to the FN 5.7x28mm Weapon System (Ammunition, Five-seveN pistol, P90 PDW, PS90 carbine, CMMG Banshee Mk57, SCHV weapons in general, conversion of other weapons, accessories, reloading, etc.)
Friday, November 15, 2019
FN PS90 K&M Lightening
Trigger job / fix for the FN PS90:
The Lightning was developed from a stock trigger pull that averaged 6lb. 13oz over 10 pulls with a digital Lyman gauge. This trigger fix is the lightest on the market to date at an average of 4lb to 4.5lb. I have gotten it to go even lower but it currently is not reliable to go lower than the 4lb range. We developed this spring in 2013 and have shipped thousands of them since the launch. This has been so successfully that others have bought and copied our spring to the exact spec and sell them for more. Beware of the imposters like Wolfies that sell on EBAY and arakacog on gunbroker. They are the same person. They bought our spring and did a copy exact. Shame on them for copying and not having a mind of their own.
Check out the review that was done in American Rifleman magazine with our product.
There are 2 ways you can have the spring installed. You need to send me your hammer pack to install the new spring that was developed or you can just buy the spring and install it yourself. It is not hard to install and can be done by watching my updated youtube video.
Price is $30 for just the spring

Price is $50 plus shipping back to you if you want me to install it for you.
FN P90 / PS90 "The Handler"
FN P90 / PS90
"The Handler" Patent pending
The handler was developed because we saw the need for a replacement charging handle for the P90 / PS90. The folding charging handle is made out of aircraft grade aluminum and anodized to mil spec type III, class 2. There is a ball detent that keeps the handle folded in when not in use.
SPEC:
Folded out has a grab length of 1-3/4"
Folded in protrudes only 1/4" more than the OEM handle
Check out the review that was done in American Rifleman magazine with our product.
Price is $50

Sheridan Engineering 5.7×28 Ammunition Gauge
$30.00 – $54.00
SLOTTED or NON-SLOTTED AMMUNITION GAUGES.
- DESCRIPTION
- ADDITIONAL INFORMATION
Choose between SLOTTED or NON-SLOTTED.
AMMUNITION GAUGES are uniquely designed to check loaded ammunition, giving you the ability to check your factory ammunition or reloads against a spec chamber. The gauge is machined to the CIP minimum chamber spec for the 5.7X28 caliber. This allows you to check brass sizing, headspace, bullet seating, and crimping all with one gauge. Stainless Steel construction. These gauges are designed primarily for use where the brass is always full length resized. Please see our FAQ for details.
SLOTTED GAUGES are an improvement of existing ammunition gauge design. By taking an ammunition gauge and opening up a window into it, you can now actually see the shoulder, and how everything seats into the chamber. You can verify the fit visually. And see the interface between your ammo and a chamber that you would never otherwise see. This unique tool is now patented.
These gauges can help you both troubleshoot and improve your reloads and purchased ammunition. . Use as a chamber checker to ensure that all of your rounds will work in any of your firearms. Use as a go/no go gauge to check the ammo headspace measurements against CIP min/max.
These gauges have steps on the face to correspond to the cartridge spec minimum brass headspace measurement, and the minimum and maximum chamber length. The diameter of the gauge is CIP min chamber spec, which is larger than the max spec of the cartridge. The length of the gauge corresponds to the max length of the cartridge.
Any rounds that fit the gauge will chamber. Unlike other gauges, ours includes the throat and bore, so that when you check the loaded ammunition, you are checking the complete round, not just the case.
These gauges allow you to:
- Speed up your checking process
- Check many critical dimensions at once
- Check your brass prior to loading it
- Perform a chamber check on your ammo, without having to chamber it in a firearm
- Perform a headspace check on your ammo
- Perform a cartridge length check on your ammo
- Catch issues with concentricity
Bullpup Armory FNH P90 / PS90
Introducing DT-CAOS
FN FiveseveN Red Dot Mounting System
https://fnspecialties.com/shop/fn-firearms/fn-five-seven-mk2-dt-caos/
https://fnspecialties.com/shop/fn-firearms/fn-five-seven-mk2-dt-caos/
MPF Technology LLC
mpftech.4gunlovers.com
MPF Technology is dedicated to offering quality components and accessories at affordable prices. You'll find our prices very competitive for high quality products.
Orders over $100.00 are shipped FREE* within the USA!
Thank you for visiting the mpftech.4gunlovers.com website.
MPF Technology is dedicated to offering quality components and accessories at affordable prices. You'll find our prices very competitive for high quality products.
Orders over $100.00 are shipped FREE* within the USA!
Thank you for visiting the mpftech.4gunlovers.com website.
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2019
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November
(31)
- P90 Laser Sight
- R&R Weapon Systems
- Elite Ammunition
- FN PS90 K&M Lightening
- FN P90 / PS90 "The Handler"
- Sheridan Engineering 5.7×28 Ammunition Gauge
- Elite Survival Systems PS90 & P90
- Bullpup Armory FNH P90 / PS90
- HiDesertDog FNH PS90 & P90
- Introducing DT-CAOS
- MPF Technology LLC
- Browse FNH P-90 / FN PS90 Products
- FIVE SEVEN RED DOT MOUNTS AND OPTICS
- MGW FiveseveN
- MGW PS90
- FN FiveseveN: Full disassembly and reassembly
- How a FN Five-seven works
- Promoted Pawn Products for PS90
- KT AKELA™ Custom S (Suppressor/Compensator) holste...
- PS90 Fluted Barrel Shroud
- P90 Exploded View
- FN P90 / PS90 Poster - Exploded View High-Quality
- Fn Ps90 X-ray Photograph is a photograph by Ray Gu...
- FN P90 Promo Video
- FN P90 Magazine Functioning
- FN P90 PROTOTYPES
- Some Pretty Weird Prototypes Preceded the P90 Subm...
- PMM Ps90/P90 QD Sling Mount
- FN Herstal P90 | Firearm Owners Association
- CMMG Banshee 300 in 5.7×28
- CMMG’s New Mk57 Pistols and SBRs in FN 5.7x28mm
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November
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