Welcome to my blog, the Gratutitous Gas Gun Geek. I originally started this blog to follow my attempts at building from scratch a WA M4, but it has since evolved into many other projects in the gas airsoft world. Watch me customize some airsoft replicas to look unique. I also do gas airsoft repairs and custom projects as well. Contact me for pricing and options!

Tuesday, February 11, 2014

Gas Rifle Project #4 - Test Bed for the GHK GBB Conversion

Welcome back everyone.  To start off the new year, I might have to step on toes.  I decided to pick up a GHK Gas Blowback Conversion kit the other week and give it a try.


When I showed others what my new project was, I was completely shocked by their response.  A number of people said they disliked the kit; they got rid of them as soon as they could.  Others thought it was a neat idea, but needs some refinement in order to be viable.  The last group were people that thought the kit was a far cry from what makes up a true GBBR, and calling it GBB was an insult!  I was taken aback by the whole conversion.  I have heard some critiques about people with Polarstar type systems*, but never heard anything like I did.

*Please note, I will never post about Polarstar type systems on this blog except as a mention for comparison.  In my opinion, they are still an AEG which requires a battery in order to power it.  Without it, the solenoids used in the system will not function and therefore, the rifle does not work.

Philosophy of Use

Going to start this off Nutnfancy style.  If you haven't heard of Nutnfancy, check out his real gun and gear reviews on YouTube.  He begins each one with a section called the "Philosophy of Use".  He uses this to set up the rest of the review.  Types of philosophy Nutn' uses are "Go to War Pistol/Rifle", "Without Rule of Law Gun", and "Recreation Gun" just to name a few.  I'm going to try and do the same thing with this kit, as there is some confusion about what its true purpose it can be.

#1 - Adapting a Current AEG for Multiple Use

I feel the primary reason this kit was developed was to get people interested in gas powered rifles.  One of the real big cons of owning a GBBR is the large, upfront expense that can come depending on brand.  A really solid AEG can run someone an average of $200.  Extra mags and batteries add another $100 to this, again depending on brand.  For a solid kit, most people look to spend $300.  A gas rifle can start at $300, and add $200 worth of mags and gas as extra.  This is assuming you don't want the extra little accessories, like lights and optics.  The upper end GBB rifles start at $700!  Not everyone sees the same way gas gunners do.

In comes this GHK kit.  For $100, you can convert any V2 gearbox M4 rifle into a gas powered blowback rifle.  Mags still cost $50 a piece, but for around the cost of getting an entirely new M4 rifle, you can convert your existing rifle to function similarly to a GBBR. (I will go into more detail about the similarities and differences later on into the project.)  The best part about it for AEG users, you don't need to repurchase or transfer your accessories over.  The kit fits into your already set up rifle.  No need to reconfigure an additional rifle.  You need some basic tech knowledge to install the kit, but other than that it will be a quick changeover for most users.  You don't even need to change the inner barrel or bucking, it uses just about everything from your existing AEG.

#2 - Making a Future GBBR Purchase

This kit is simply a taste of  what a true gas rifle offers the user.  It has recoil, a simulated bolt stop, and a functioning charging handle.  What more could someone want?  Well, these aspects are only a taste.  What you don't get with the kit is realistic disassembly, compatibility with real firearm accessories, full stroking bolt, and a functioning bolt release.  I think with this kit, it is a stepping stone to seeing what kinds of cool features you get with a full gas rifle.

Gratuitous's GHK Kit
So what is my rifle going to be?  Well, I have always wanted the Lewis Machine and Tool MRP rifle.  G&P used to make one using the Western Arms platform under the name of "Bomber" and G&P being a prominent AEG manufacturer also makes an LMT MRP as an electric gun.  The original owner I got it from bought it as a back up to his LMT Defender 2000 (which uses a different rail system and upper).  For the most part it sat in his closet gathering dust.  I managed to pick it up for a pretty good price.


Being a G&P, it has great external quality, which is why I picked it for the GHK conversion test bed.  The trademarks look very impressive and fit in all of the right places.  The MRP is unique in its rail system.  Unlike others, the upper and rail are machined from one solid piece.  G&P replicated this out of a solid casting, but the entire gun feels rock solid.  The barrel is of a quick change change design as well, easily removed using two Torx head screws.  The only issue with this is you need to use an LMT barrel, as it has a proprietary design on the real rifle.  On the real deal, you can convert the rifle from a standard direct impingment to a piston design in under 5 minutes.  Even going from one barrel length to another is easy to do.  Currently, it features a 10.5 in barrel for the AEG version, but it also comes in a 14.5in.







For the other external things, probably an optic of some kind.  Not quite sure yet, but I have to see what I can get for cheap or have extra sitting around.  Another thing I want to see if I can get my hands on is a Redi-Mag.  The Redi-Mag is designed to attach a second magazine directly to the rifle so when I need to reload quickly, I don't need to fish a mag from my pouches or pockets.  The only real con to this system is it makes the gun heavier.  Should be fun to mess around with, assuming the GHK mags fit once it gets here.

That is the newest project.  The next post about it will be the installation.  Keep a look out for it!

Saturday, February 8, 2014

Work Bench - January 2014

Welcome back reader.  As expected, I have been lying in wait as more parts and pieces come in the mail.  That being said, it does seem like I have a lot on my plate lately.  I seem to pick up projects left and right that I think are cool.  Allow me to continue what I have planned out:

 - Gas Gun Project #4 - GHK GBB Conversion Kit

I have always wondered about this kit.  For $100 plus the cost of mags, you can convert any Version 2 gearbox M4 AEG into a gas blowback rifle.  G&G realized it was a good idea and made an entire line of GBB box AEG guns.  I had to purchase an AEG for this, but even if the GBB kit doesn't work out I can at least put the electric guts back into it and sell it off.  For the price I've paid so far for it, I think it is worthwhile to document my progress with it to see if it is worth it.  I'll be laying it out in a few posts; The introduction, the installation, and the final review.  The review will be taking the most time, as I will need to put the gun through its paces.

- Gas Gun Project #5 - Soviet-Afghan AK74

One thing that has always seemed to puzzle me is why WE-Tech made their AK-47 (technically speaking it is an AKM) a "PMC" variation with rails and M4 stock.  Maybe they thought that everyone just ended up "tacticool"ing the rifle with new hand guards and other parts and decided to just make it a factory choice.

I never really liked the modern AK's.  I can see why people are drawn to them, but they are just not for me.  So, I've decided to add some real AK74 wood to my AK PMC I picked up and give it that 1980's Soviet-Afghan War look.  As far as what kind of compatibility issues I will run into, I have no idea.  Most people who have done wood conversions on the WE AK PMC used AEG or GHK ones.

- Gas Research Project - Finding the Ultimate Grenade Launcher

Grenade launchers in airsoft have always been one of the tougher items to field.  They do have their short comings, I will admit that, but I do believe there could be a viable purpose to fielding a grenade launcher.  All too often people are willing to point out the obvious flaws; increased weight, expensive, limited usage (much like sidearms).  So in my quest of all things gas powered, I am determined to find the winning combination of launcher, grenade, and projectile.  It will be an expensive endeavor, but I have a feeling the final results will be worth it.

I hope to start being able to post some concrete updates rather than these little teasing posts once a month.  I have a feeling next month is going to be a lot of introductions though.  Stay tuned in!