Garbage 6061 charge handles were another big thing. What I'm seeing now is new comers entering the market in the past 10 years, in what I call the post Clinton AWB expiration era, which goes up to Sandy Hook, covering a period from 2004-2012, followed by the post-SH era, which is an abortion of epic proportions.
The history of the civilian market is broken down into several generations first off, and these are what I documented in a very detailed market analysis for my capstone project in my Business Management Degree. Off the top of my head:
* January 2nd, 1964 to 1982: The Colt Model R6000 was introduced to the market, known as the Colt SP-1. This early model had a lot of original parts common with the Colt 601, and there are variations. The Colt SP-1 evolved along with the design changes that were incorporated into the Model 603(M16A1) military rifle over the years, minus the forward assist, while retaining different upper receiver, lower receiver, and fire control components that Colt had changed for the civilian market. They are actually very well-built rifles with solid parts made to the TDP in terms of materials sourcing, certs, assembly methods, while deviating from M16-specific parts.
* 1982-1988: Here is where we saw some of the after market parts start to filter into the market, GM Hydramatic stuff, Quality Parts/Bushmaster, Eagle Arms, Olympic Arms, and home builds from all sorts of weird places, Shotgun News ads, gun shows, etc. The first after market source of different furniture designs that I'm aware of was Lone Star Ordnance, with the stow-away pistol grip, ribbed A2-ish handguards, and then Choate with their buttstocks. After market plastic carbine stock kits were horrendous for the most part, with purple hues, soft, toyish-looking construction. There was a lot of frankengun crap on the market for those who were looking, while you could find some really nice Colt SP-1 and Sporter II rifles and carbines new on gun shelves for between $370 to $635 in that date range.
* 1988 to 1994: This is where Bushmaster and Panther Arms/DPMS really started rising up in the industry. Bushmasters started to become the go-to AR15's for many people after they received rave reviews in Soldier of Fortune, and were prominently displayed in the gun buyer rags. RSR, Accusport, and Ellett Brothers started carrying them and shipping to gun shops across the land, and CA was huge until the CA AWB after the Patrick Purdy school yard shooting. In the early 1990's, large frame AR's chambered in 7.62 NATO were manufactured again for the first time since the original Armalite AR10's from the 1950's and 1960's, with Eugene Stoner's new SR25 hitting the shelves first from Knight's Armament Corporation, followed by Eagle Arms' EA-10, which was later re-branded with the Armalite name. Both went on to become highly successful, and Eagle increased their EA15 market as well.
Colt broke a major barrier that went largely unnoticed by customers, but not several key people in the industry, and that was the development and distribution of the Colt AR15 7.62x39 Sporter II. This was to have consequences for the market that a lot of people could not grasp at the time.
* 1994-2004: Clinton AWB really had the opposite effect on the industry, where manufacturers jumped to meet the demand once the Congress passed the Clinton AWB. They did this by supplying tons of rifles without flash hiders, bayonet lugs, or telescoping stocks, and customers wizened up as to the game by buying them en masse, and having muzzle breaks installed if they wanted, using fixed telestocks, and basically moving forward. Many people who would have never purchased an AR15 did so, and Bushmaster, DPMS, and RRA really rose as the main manufacturers of look-alike models of the AR15, while pushing a major advertising campaign touting the benefits of their products. You could still buy Complete Colt uppers that were very high quality and commanded top dollar, in addition to complete neutered Colt rifles and carbines. Several small shops emerged during this era focusing on their specialty of billet receivers, high-end barrels, etc.
* Quality during that era with Bushmaster started out fairly decent, but as demand increased, things like BCG assembly took a dive, and a lot of guns had carrier keys that would come loose in high volume shooting sessions, which were becoming more and more popular with the rise of 3-gun, contractor demands for fleet weapons, and training courses put on by experienced and inexperienced entrepreneurs. At the tail end of this 1994-2004 period, we had 9/11, which was basically a watershed for the firearms industry. Not only were numerous contractors demanding guns now, but every Billy Bob, returning soldier, and gun rag consumer had to have one or 5 of them, and by stars, they had to have the bestest, most spechulist forcesist AR15's of them all, complete with KAC rails or look alikes, vertical grips, Chinese red dots, lasers, phone cord pressure switches, bipods, 3-rail rail mounts to go on top of your rails....you get the picture.
* DPMS soon jumped on the .308 bandwagon, introducing an economy-grade 6061 receiver set rifle entitled the LR-308, with a translucent, ban-compliant 10rd magazine that would lose shavings with every cycle of the BCG, but was typically very accurate for a gun off the shelf. RRA licensed their .308 design to Bushmaster, calling it the BAR-10 and ran on FAL mags, which went through enough teething issues to be quickly discontinued, only to be released again by a more capable RRA as their LAR-8.
* Most importantly, we saw the addition of several new cartridges that were stuffed into the AR15 that took away the hunting barrier for many people. The .50 Beowulf, 6.5 Grendel, and 6.8 SPC emerged by 2004, creating a new wave of high performance cartridges that fit nicely in the popular AR15, opening up all kinds of doors for shooters who would never own an AR15, or use one for their common purposes because of what they viewed as an inferior chambering with the .223 Remington/5.56 NATO.
2004-2012: Post-ban, pre-SH era. Here is where the market really expanded in the wake of 9/11 and the end of the Clinton AWB, which had a 10-year limit to it. The wars were raging strong, and appetites for AR15's and AR10's displaced the common hunting rifle trends that are tracked by NSSF and the ATF quarterly, as well as annually. Trends in ammunition consumption and rifle purchases went into an upward spiral, which were fueled even further with the election of a certain junior Senator to the White House with an aggressive anti-gun track record.
Firearms, ammunition, and accessories sales surged so much, that venture capitalists started buying into the industry, even merging major auto financing with national grocery chain stores, as well as public teacher retirement plans. Several major AR15 and rifle-maker names were bought and placed under the same corporate ownership, including Remington, Bushmaster, DPMS, and Marlin. This really created a first in the American firearms industry history, with a mega company swallowing several huge and historical brands, in addition to 2 of the largest AR15 manufacturers in the world.
* The caliber variation market caught on with a lot of traction, resulting in not only several ammunition manufacturers supporting them, but more cartridges developed to fit in the AR15 that would be well-suited to hunting.
The industry was really at its peak in terms of being able to crank out Bushmaster and DPMS-grade rifles that could get through your plinking sessions of maybe a few boxes of ammo before problems arose, but then something terrible happened.
* The Post Sandy Hook Era: December 14, 2012. A strange kid reportedly kills 20 children and 6 adults with an AR15, and the strained market goes insane. Along the past 2 generations, several small shops have risen to be sought after AR15 builders with various degrees of specialization or economy pricing, to include those that only made upper receiver groups and sold other parts for DIY type customers. This era also coincides with a time when some of the industry's best engineers, machinists, shop foremen, and technicians (mostly baby boomers), are retiring to go home and chill for their remaining years, if the acetone, blast media, metal shavings, and smoking habits haven't claimed their lives earlier.
We basically had a perfect storm where demand was beyond unprecedented, the industry was having a very difficult time meeting the unpredictable demands of a wide range of customers, and the inherent design of the AR15 family of weapons is such that you can buy critical parts out from the supply chain from up and coming shops who don't have the same clout as a venture capitalist does. Compounded with the lack of well-educated new employees who are part of the excessively THC blood content "I deserve/want it now for nothing." generation, and don't expect much in terms of quality control.
Slap a nice coat of Cerakote on the rifle, throw in an uber tactical charge handle, melonite the barrel, CNC engrave some skulls in it, and you are well on your way to the $2000 plus garbage rifle market, never mind springs, detents, MIM'd LPK's, certs on barrel extensions or bolts, extractors, steel pedigrees, etc. Add your company's unique rail handguard, or carbon fiber tube, and you are cooking with crisco. The ammunition industry is showing signs of the wheels falling off as well in the post-SH era, with demands so high that they could literally afford to care less what primers, powder charges, and loads they spit out the door, made even worse by gas-operated AR15's and AR10's that have very specific pressure curves to run the systems reliably and safely.
Despite all of this, a few solid industry pillars continue to hold true to their core values and visions.
Colt, BCM, DD, Alexander Arms, LMT, and JP come to mind. I haven't purchased a complete AR15 off the shelf since 1997 or 1998, and I'm a controlled panic buyer club member since the post Patrick Purdy school yard shooting in Stockton, CA, 1989.